Type-writing machine.



No.863,8 90. PATENTED AUG. 20, 1907.

'0. WOODWARD.

TYPEVWRITING MACHINE;

APPLIOATION IILED MAY 10. 1906.

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WWNE55E5= YTTURNEY-"J 0. WOODWARD.

TYPE WRITING MACHINE. APPLICATION FILED MAY 10, 1906.

PATQENTED AUG. 20;'1907.

3 SHEETS'SHEET 2.

INVENTDR;

HEAL? No. 863,890. PATENTED AUG. '20, 1907.

0. WOODWARD.

TYPE WRITING MACHINE.

APPLIOATION FILED MAY 10. 190B.

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WiTNESSEi- INVENTUR:

V JIE'A TTEIRNEY efficient repulser devices of the character specified.

UNITED s N. Y., ASSIGNOR ATES PAT N OFFICE.

TO WYGKOFF, SEAMANS & BENEDICT,

OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING- MAGEINE.

To all whom it may' concern:

Be it known thatI, OscA'R Woonwknn, a citizen ofthe United States, and aresident of the borough of Manhattan, city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My invention relates to typewriting machines and more particularly to repulsers for causing the type bars to be quickly removed from contact with the platen after each imprint.

The object of my invention is to produce simple and To the above and other ends whichwill hereinafter appear, my invention consists in the features of construction, arrangements of parts and combinations of devices to be hereinafter described and particularly pointed out in the appended claims.

. In the drawings, wherein like reference charactersindicate corresponding parts in the different views, Figure 1 is a vertical, front to rear, sectional view of sufficient number ofparts of one form of typewriting machine to show my invention in its application thereto. Fig. 2 is a transverse-sectional view of the same, with parts omitted, the section being taken on the line x r of Fig. 1 and looking in the direction of the arrow at said line. Fig. 3 is a detail rear perspective view showing the support for the various repulsers and the repulsers mounted in place thereon. Fig. 4 is an enlarged detail fragmentary sectional view taken transversely through the support for the repulsers, the section cutting one of the chambers in which a re pulser is mounted.

I have shown my invention applied to a visible or front-strike typewriting machine wherein it is particularly applicable, but it should be understood that the invention maybe employed in various styles of typewriting machines.

The particular machine to which the invention is shown applied in the present instance forms the subject-matter of a separate application filed by me on the 15th day of August, 1905, Serial No 274,288. j

The frame of the machine comprises a base 1, corne'r posts 2 and a top plate 3. A carriage (not shown) is mounted above the top plate to travel from side to side of the machine and carries a platen 4 diagrammatically illustrated. Key levers 5 are notched at 6 where they turn on a fulcrum plate 7 secured to the base of the machine by screws 8. Each key lever is provided with a restoring spring 9 connected at one end to the key lever and at its opposite end to a connecting device 10 which is secured to thebase of the finger keys 11 and are guided at their forward ends in Patented Aug. 20, 1907.

a comb plate 12. Each key lover is connected to a. link 13 which has its upper end connected at 14 to a sub-lever 15 pivotedat 16 to a hanger 17. The various hangers 17' are segmentally arranged and are secured I to a segmental support 18 by screws 19; .The support 18 has a pad 20 at the upper side thereof which supports the forward ends of upwardly and rearwardly striking, segnientally arranged, type bars 21. The type bars in the present instance are shown as'pivoted in two arcs, one above the other. The set of type bars in the highest arc are pivoted at 22 to hangers 23 which are secured by screws 24 to a type bar segment" 25.

27 secured to the segment 25 by screws 28. Draw links '29 connect the various sub-levers 15 and the typebars 21. A depression of any of the keys 11 will cause the associated type bar to swing upwardly and rear The other set of type bars are pivoted at 26 to hangers wardly to the printing position as shown in Fig. 1, the

type bar impacting against the front face of the platen 4. The construction thus far described is essentially the same as that shown in my application hereinbefore referred to and further description thereof is deemed unnecessary. l i r 4 A support 30 which is shown in detail in Fig; 3 is provided with depending lugs 30 on the rear side thereof, said lugs being slotted at 30 headed screws 30 by which the support is connected to the type bar segment 25 as shown in Figs. 1 and 2; the lugs 30 extending back of the segment 25 as indicated for cooperation with an apertured guide formed as a segment with two series of perforations or chambers 31 that extend therethrough fore and aft of the machine. These holes, chambers or openings 31 are arranged in two arcs indicated by the dotted lines a and b in Fig. 2. These arcs are struck from the printing point or from a point adjacent to the printing point and the arcs have different radii, and one is situated above the other. repulser or plunger 32 extends through each opening or'chamb'er 31 and is provided with an enlargement 33 which is contained within the chamber and forms an abutment against which one end of a coiled expansion spring 34 bears, the other end of said spring bearing against the rear wall 35 of the chamber. A contracted opening 36 in the rear wall of each chamber constitutesa guide for the rear end of the associated plunger 32. The forward end of the plunger passes through a central opening in a nut or block 37 which is exteriorly threaded at 38 to cooperate .with interior threads in the forward end of the chamber nicks or slots 39 for the reception of a suitable tool by which they may be screwed into position-in-the chambers 31 to close the forward ends thereof. The tension of each spring 34 is exerted to maintain the forward end of the associated plunger 32 in its forward position I where it projects forward of the front face of theisuppor pressed plunger-s 32 are situated in substantially the same vertical transverse plane and are interposed between the pivots of the type bars and the printing point. p

The number of repulsers are preferably equal to the number of type bars employed in the machine so that each type barcodperates with an independent repulser, and from an inspection of Figs. 1 and 2 it will be understood that adjacent type bars cooperate with plungers or repulsers in the difierent arcs a and b.

By staggering the repulsers in the manner indicated and arranging them in arcs of different radii, I am enabled to provide a separate plunger or repulser for each type bar and to situate the repnlsers between the pivots of the type bars and the printing point.

In the operation of the machine the depression of the finger key will cause the type bar 21 to be moved up wardly and rearwardly to the printing point and at the last portion of the printingmovement the type bar will contact with the forward end of its associated plunger 32, thereby forcing it against the tension of its spring 34 during the remainder of the printing stroke. As soon as pressure is released upon the finger key, or in some cases before the pressure is released, the type bar will be quickly moved by the repulser away from the platen so as to prevent the production or blurring imprints or ghosts, thus affording a' construction which enables clear imprints to be produced at all times and under all conditions.

' By employing an independent repulser for each type bar, I am enabled to provide comparatively light repulsers which do not appreciably affect the touch or the printing operation of the type bars; but which are, nevertheless, eflicient to prevent the blurring which is sometimes produced when the type bars are not removed from the platenor do not rebound therefrom with suiiicient rapid ity.

-It will be understood that the full momentum of the type bar has'been acquired before it reaches contact with its associated repulser and that the action of the repulser on the type bar does not appreciably affect the printing operation except to assure the quick removal or rebound of the type bar from the printing position and from contact with the paper on the platen. Furthermore, the points at which the repulsers cooperate with the type bars enable the repulsers to act withgreat efiiciency. The repulsers not only prevent the production of blurring imprints but assure a quick .return of each type bar from the vicinity of the print- ,seo 1 which are pivoted at 26 to the hangers. 27 cooperate not claimed.

What I claim as new and desire to secure by Letters Patent, is:-

1. In a typewriting machine, the combination 01; segmentally arranged type bars, and a plurality of independent staggered repulsers, one for each type bar, each repuiser being" operated upon by its associated type bar as the type bar approaches the printing position.

. 2. In a typewriting machine, the combination of seginentally arranged type bars, and two series of segmentally arranged spring restored repulsers, one for each type bar, the repulsers of one series being arranged in an arc whose radius is greater than the radius of the are in which the other series of repulsers is situated.

3. In a typewriting machine',. the combination of segmenta'ily arranged type bars, and two series of segmentally arranged spring restored repulsers, one for each type bar,. the repulsersof one series'being arranged in an arc whose radius is greater than the radius of the are in which the other series of repulsers is situated, the various repulsers of. the two series being staggered relatively to each other.

4. In a typewriting machine, the combination of segmentally arranged type bars, and two series of segmentally arranged spring restored repulsers, one for each type bar. the repulsers of one series being arranged in an arc whose radius is greater than the radius of the are in which the other series of repulsers is situated, and adjacent type bars coiiperating with repulsers of the different series.

5. In a typewriting machine, the combination of a pinrnlity of segmentally arranged type bars, and cooperating mentnlly arranged type bars, plunger-s arranged in two.

arcs ofdiiferent-radii; one plunger co jperating with each type bar, arid a spring for each plunger, each spring being flexed by its plunger during the movement of the associated type bar to the printing position, adjacent type bars coiiperating with plunger-s in different arcs.

7. In a fi'ont'strike typewriting machine, the combination of segmentally arranged upwardly and rearwardly striking type bars, and a. plurality of independent springpressed piungers which move fore andaft of the machine, each type bar contacting with an associated plunger during the movement of the type bar to the printing position and flexing the spring of said plunger.

8. In a front-strike typewriting machine, the combination of segmentaliy arranged upwardly and rearwardly striking type bars, and a plurality of independent spring pressed plungers which move fore and uft of the machine and are arranged in two arcs of different radii, each type bar contacting with an associated plunger 'during the movement of the type bar-to the printing position andflexing the spring of said plunger 9. In a typewriting machine, the combination of a sc ries of segmentally arranged type bars, a support having a plurality of segmentally arranged holes or chambers formed therein, and a series of spring-pressed plunger-s received and guided in said chambers and with each of which an associated type bar is adapted to contact in the move ment of the bar to the printing position. I

ries of segmentally arranged type bars, a support having a plurality of holes or chambers formed therein and arranged in two arcs of diflerent radii, and a series of springpressed plungers received and guidediin said chambers and with each of which an'assoclated type bar is adapted to contact in the movement of the bar to the printing position.

11. In a front-strike typewriting machine, the combination of a series of segmentally arranged upwardly and rearwardly striking type bars, a support having a plurality of segmentally arranged holes or chambers formed therein and extending fore and aft of the machine, and a series of sp'ringpressed plungers received and guided in said chambers and moving fore and aft of the machine, each type bar contacting with'an associated plunger in the movement of the bar to the printing position.

12. In a front-strike typewritlng machine, the combina tion of'a series of segment sally arranged upwardly and rearwardly striking type bars, a support having a plurality of holes or chambers formed therein and extending fore and aftof the machine and arranged in two arcs of difl'erent radii, and a series of spring-pressed plungers received and guided in said chambers and moving fore and aft of the machine,.each type bar contacting with an associated plunger in the movement of the bars to the printing position. 7 ,1 p

13. In a front-strike typewriting machine, the combination of a series of segmentally arranged upwardly and rearwardly striking type bars, and a plurality of independent spring pressed repulsers, one for each of said type bars, the repulsersbeing arranged in two arcs one above the other,the spring of each of said repulsers being placed under strain by its associated type bar in the movement of the latter to the printing position. a

14. In a trout-strike typewritlng machine, the combination of a series of segmentally arranged upwardly and ,rearwardly striking type bars; a plurality of independentspring-pressedrepulsers arranged in ,two arcs one above the other, the spring of each of said repulser-s being placed.

under strain by its associated type bar in the movement of the latter to the prlntingyposition-and each of. said repulsers comprising a plunger and a coiled spring surround-- ing the stem of the plunger; and an apertured guide in which all of said plungers work.

15. In a front-strike typewriting machine, the combination of a series of segmentally arranged upwardly and rearwardly striking type bars, and a series of independent segmeutally arranged spring pressed repulsers, one for each of said type bars, said repulsers being arranged in two arcs in the same plane, the arcs situated one above the other, the spring of each of said plungers being placed under strain by its associated type bar in the movement of the latter to the printing position, each of said repulsers comprising a plunger, a chamber in which said plunger works, a coiled spring contained within said chamber and surrounding the stem of said plunger, and a removable perforated block that closes one end of the chamber and receives the stem 01! the plunger in the perforation in the block.

16, In a typewriting machine, the combination of a series of type bars; and a plurality of spring-pressed repulsers arranged in two arcs of dilterent radii, the spring of each repulser being placed under strain by the associated type bar as the latter approaches the printing position, each r'epulser comprising a plunger with which the' associated type bar contacts at the last portiomof its printing stroke, a guiding chamber in which said plunger works, a coiled spring contained within said guiding chamber and surrounding a portion of the plunger and bearingat one end against the plunger, and a plug with 2.

perforation in which the plunger is received and by whichthe plimger is guided, said plugbeing threaded intothe guide chamber at one end thereof. V j

17. In a front-strike typewriting machine, the combination of a series 01' segmentally arranged upwardly and rearwardly striking type bars, and a series of independent spring pressed repulsers arranged in two arcs one above the other'and in substantially the same plane, one repulser being'provided for .each of said type bars, the spring of each repulser being placed under. strain by its associated type bar in the movement of the latter to the printing p0- I sition, each of said repulser's comprising a plunger that moves fore and aft of the machine, and with which the associated typebar contacts at the last portion of its printing stroke, a guiding chamber in which said plunger works, a coiled spring contained within 'said guiding cham her and surrounding a portion of the plunger and bearing at one end against the plunger, and a plug'with a perforation'in which the plunger is received and by which the plunger is guided, said plug being threaded into the guide chamber at one end thereof.

18. In a typewriting machine, the combination of a series of :segmentally arranged pivoted type ars, and a series of segment ally. arranged staggered type bar repulsers situated between the pivots of the type bars and the printing point, each type bar contacting with an inde-' pendent repulser during the movement of the type bar to the printing position.

19. In a typewriting" machine, the combination of aserles of segmentally arranged pivoted type bars, a support having a plurality of holes or chambers formed therein and arranged ifi two arcs of different radii, the

the type bars and the printing point, a series of holes or chambers formed in said support and extending fore and aft of the machine, said chambers being arranged in two 'arcs of different radii and the chambers in one are being staggered relatively to the chambers in' the other arc, and

a series or spring pressed plungers which work insaid chambers and move fore and aft of the machine, each type bar contacting with a separate plunger in the movements of the type bars to the printing position and adjacent type bars coiiperating with plungers in diifereut arcs.

Signed at the borough of Manhattamcity of New York, in the county of New York, and State of New York, this 9th day of May, A. D. 1906.

OSCAR WOODWARD.

Witnesses:

E. M. WELLS, M. F. HANNWEBEB. T 

